#include <stdio.h>

int addToTop(int top)
{
    int sum = 0;
    for(int i = 0; i < top; i++) 
    {
        sum += i;
    }
    return sum;
}

int main() 
{
    int top = 30;
    int result = addToTop(top);
    printf("%d\n", result);
    return 0;
}

